Finding the Fourth Proportional to 5,789.72, 7,989.96 and 3,520.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,789.72 : 7,989.96 = 3,520.28 : x
2. Step 2: Convert to fraction form
   5,789.72/7,989.96 = 3,520.28/x
3. Step 3: Cross multiply
   5,789.72x = 7,989.96 × 3,520.28
4. Step 4: Simplify right side
   5,789.72x = 28,126,896.39
5. Step 5: Solve for x
   x = 28,126,896.39/5,789.72
6. Step 6: Final answer
   x = 4,858.08